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The conversion equation is based on 25 ºC and 1 atmosphere:
Fill in either the "ppm" value (X) or the "mg/m3" value (Y) AND the molecular weight of the compound. Then press the "Calculate" button.
ppm: mg/m3: molecular weight:
Remember to consider significant digits in your use of the answer.
To determine molecular weight, add the atomic weights of all atoms present in the chemical formula for a particular substance. Periodic Table (courtesy of Los Alamos National Laboratory).